<template>
<div>
  <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb>
<el-card>
<el-row>
  <el-col>
    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
  </el-col>
</el-row>
<el-table :data="rolesList" stripe border>
  <!--展开列-->
  <el-table-column type="expand">
    <template slot-scope="scope">
      <!--利用for循环，循环一级二级三级权限-->
      <!--绑定类名：动态绑定不能是字符串，而是数组,三元表达式判断是否给元素加边框-->
      <el-row :class="['bdbuttom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
        <!--渲染一级权限-->
        <el-col :span="5">
        <el-tag @close="removeRightId(scope.row,item1.id)">{{ item1.authName }}</el-tag>
        <i class="el-icon-caret-right"></i>
        </el-col>

        <!--渲染二级和三级权限-->
        <el-col :span="19">
          <!--通过 for循环 嵌套渲染二级权限-->
        <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
          <!--二级权限-->
          <el-col :span="6">
            <el-tag type="success" @close="removeRightId(scope.row,item2.id)">{{ item2.authName }}</el-tag>
            <i class="el-icon-caret-right"></i>
          </el-col>
          <!--三级权限-->
          <el-col :span="18">
            <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightId(scope.row,item3.id)">
            {{ item3.authName }}
            </el-tag>
          </el-col>
        </el-row>
        </el-col>
      </el-row>
    </template>
  </el-table-column>
  <!--序号列-->
  <el-table-column type="index" label="#"></el-table-column>
    <el-table-column label="角色名称" prop="roleName"></el-table-column>
    <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
    <el-table-column label="操作" width="300px">
      <template slot-scope="scope">
        <el-button type="primary" icon="el-icon-search" size="mini" @click="showRoleDialog(scope.row.id)">编辑</el-button>
        <el-button type="danger" icon="el-icon-delete" size="mini" @click="delRoleInfo(scope.row.id)">删除</el-button>
        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showRightDialog(scope.row)">分配角色</el-button>
      </template>
    </el-table-column>
</el-table>
</el-card>
<el-dialog
  title="添加角色"
  :visible.sync="addDialogVisible"
  width="50%"
 >
 <!--文本内容区域-->
 <el-form :model="addRoleForm" :rules="roleFormRule" ref="roleFormRef" label-width="100px" class="demo-ruleForm">
  <el-form-item label="角色名称" prop="roleName">
    <el-input v-model="addRoleForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="addRoleForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRole()">确 定</el-button>
  </span>
</el-dialog>

<el-dialog
  title="修改角色"
  :visible.sync="editDialogVisible"
  width="50%"
  @close="editDialogClosed"
 >
 <!--文本内容区域-->
 <el-form :model="editForm" :rules="roleFormRule" ref="roleFormRef" label-width="100px" class="demo-ruleForm">
  <el-form-item label="角色名称" prop="roleName">
    <el-input v-model="editForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="editForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRole()">确 定</el-button>
  </span>
</el-dialog>
<!--分配权限对话框-->
<el-dialog
  title="分配权限"
  :visible.sync="rightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!--树形控件-->
  <el-tree :data="rightsList" :props="treeProps"  ref="rightRef" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="rightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
</div>
</template>

<script>

export default {
  data() {
    return {
      rolesList: [],
      // 所有权限的数据
      rightsList: [],
      addDialogVisible: false,
      editDialogVisible: false,
      rightDialogVisible: false,
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点ID值
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 添加角色表单数据
      addRoleForm: {
      },
      editForm: [],
      roleFormRule: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getRolesList()
  },

  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },

    addRole() {
      this.$refs.roleFormRef.validate(async valid => {
        if (!valid) return
        // 发起请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色信息失败！')
        }
        this.$message.success('添加角色信息成功')
        this.getRolesList()
        this.addDialogVisible = false
      })
    },

    editDialogClosed() {
      this.$refs.roleFormRef.resetFields()
    },

    async showRoleDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        this.$message.error('获取角色信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },

    editRole() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('roles/' + this.editForm.id, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 重新刷新列表
        this.getRolesList()
        // 提示用户修改成功
        this.$message.success('更新角色成功！')
      })
    },

    async delRoleInfo(id) {
      // 弹窗提示用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确定删除，则返回值为字符串：confirm
      // 如果用户取消删除，则返回值为字符串：cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // 发起删除用户axios请求
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },

    // 根据ID删除对应的权限
    async removeRightId(role, rightId) {
      // 弹窗提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确定删除，则返回值为字符串：confirm
      // 如果用户取消删除，则返回值为字符串：cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // 发起axios请求删除权限
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList() 这个是全局刷新
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showRightDialog(role) {
      this.roleId = role.id
      console.log(role)
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // 获取到的权限数据保存到rightsList中
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      console.log(this.defKeys)
      this.rightDialogVisible = true
    },

    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包括children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件——每一次关闭都清空数组里的数据
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.rightRef.getCheckedKeys(),
        ...this.$refs.rightRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.rightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbuttom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
